jtabwbx.prop.formula

Interface _SingleSuccedentSequent

All Superinterfaces:

_AbstractGoal

All Known Implementing Classes:

SingleSuccedentSequentOnArray, SingleSuccedentSequentOnBitSet, SingleSuccedentSequentOnBSF, SingleSuccedentSequentOnLists

public interface _SingleSuccedentSequent
extends _AbstractGoal

Interface modelling a sequent of the form S ==> H where S is a sets of propositional formulas and H is a propositional formula.

Method Summary

Modifier and Type	Method and Description
void	addLeft(Formula wff) Add the specified formula to the left hand side of this sequent.
void	addRight(Formula wff) This method add the specified formula in the right hand side of this sequent.
_SingleSuccedentSequent	clone() Returns a fresh copy of this sequent.
boolean	containsLeft(Formula wff) Returns true if this sequent contains the specified formula in the left hand side and false otherwise.
java.util.Collection<Formula>	getAllLeftFormulas() Returns the set containg all the formulas in the left hand side of this sequent or null if the left hand side of this sequent is empty.
java.util.Collection<Formula>	getAllLeftFormulas(FormulaType formulaType) Returns the collection of all the formulas in the left hand side of this sequent with the specified type or null if the left hand side of this sequent does not contain any formula of the specified type.
Formula	getLeft() Returns a formula from the left hand side of the sequent or null if le theft hand side is empty.
Formula	getLeft(FormulaType formulaType) Returns a formula of the specified type contained in the left hand side of the sequent or null if no formula of the specified type occurs in this sequent.
Formula	getRight() Returns the formula in the right hand side of this sequent or null if the right hand side of this sequent is empty.
Formula	getRightFormulaOfType(FormulaType formulaType) Returns the formula in the right hand side of this sequent if the formula has the specified type or null if the formula in the right hand side does not have the specified type.
boolean	isIdentityAxiom() Returns true iff this is an identity axiom, that is a sequent of the kind S,H ==> H.
boolean	removeLeft(Formula wff) Removes the specified formula from the left hand side of this sequent, if it is present.
boolean	removeRight() Removes the right formula form this sequent.

Methods inherited from interface jtabwb.engine._AbstractGoal

format

Method Detail

addLeft

void addLeft(Formula wff)

Add the specified formula to the left hand side of this sequent.

Parameters:

wff - the formula to add.

addRight

void addRight(Formula wff)

This method add the specified formula in the right hand side of this sequent. Since this class models single conclusion sequent if a formula is already present in the right hand side this method replace the previous formula with the specified one.

Parameters:

wff - the formula to add in the right hand side of the sequent.

clone

_SingleSuccedentSequent clone()

Returns a fresh copy of this sequent.

Specified by:

clone in interface _AbstractGoal

Returns:

a clone of this sequent.

containsLeft

boolean containsLeft(Formula wff)

Returns true if this sequent contains the specified formula in the left hand side and false otherwise.

Parameters:

wff - the formula to search

Returns:

true if the right hand side of the sequent contains the specified

getAllLeftFormulas

java.util.Collection<Formula> getAllLeftFormulas()

Returns the set containg all the formulas in the left hand side of this sequent or null if the left hand side of this sequent is empty.

Returns:

the left-hand side of this sequent or null.

getAllLeftFormulas

java.util.Collection<Formula> getAllLeftFormulas(FormulaType formulaType)

Returns the collection of all the formulas in the left hand side of this sequent with the specified type or null if the left hand side of this sequent does not contain any formula of the specified type.

Parameters:

formulaType - the type of the formulas.

Returns:

the collection containing all the formulas of the specified type or null if the left hand side of the sequent does not contain any formula of the sepcified type.

getRight

Formula getRight()

Returns the formula in the right hand side of this sequent or null if the right hand side of this sequent is empty.

Returns:

the formula on the right or null.

getLeft

Formula getLeft(FormulaType formulaType)

Returns a formula of the specified type contained in the left hand side of the sequent or null if no formula of the specified type occurs in this sequent.

Parameters:

formulaType - the type of the formula to be returned

Returns:

a formula of the specified type contained in the left hand side of the sequent or null.

getLeft

Formula getLeft()

Returns a formula from the left hand side of the sequent or null if le theft hand side is empty.

Returns:

a formula or null.

getRightFormulaOfType

Formula getRightFormulaOfType(FormulaType formulaType)

Returns the formula in the right hand side of this sequent if the formula has the specified type or null if the formula in the right hand side does not have the specified type.

Parameters:

formulaType - the type of the formula to be returned

Returns:

the formula in the right hand-side of the sequent if it has the specified or null if the type of the formula in the right hand side is different from the specified type.

isIdentityAxiom

boolean isIdentityAxiom()

Returns true iff this is an identity axiom, that is a sequent of the kind S,H ==> H.

Returns:

true iff this is an identity axiom.

removeLeft

boolean removeLeft(Formula wff)

Removes the specified formula from the left hand side of this sequent, if it is present.

Parameters:

wff - the formula to remove.

Returns:

true if this sequent contained the specified element.

removeRight

boolean removeRight()

Removes the right formula form this sequent.

Returns:

true if this sequent contained a formula in the right-hand side.